VITIATION SENSING DEVICE – Flashcards
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| VITIATION SENSING DEVICE KEYWORDS |
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| NORMALLY A TWO PORT PILOT BURNER [image] |
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| VITIATION SENSING DEVICE HOW IT WORKS (In 2 ways) |
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| PILOT FLAME LIFTS OFF FROM THERMOCOUPLE OR ELECTRODE TIP. SEARCHING FOR OXYGEN CLOSING THE ELECTROMAGNETIC GAS VALVE OR ACTING THE FLAME RECTIFICATION CIRCUIT IN RESPONSE TO INCREASING POCs,WHERE THE APPLIANCE IS LOCATED.(USUALLY WITH DECREASE OF 1.5-2% IN OXYGEN LEVELS. |
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| VITIATION SENSING DEVICE WHERE FOUND |
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| FITTED ONÂ BOILERS,FIRES, WATER HEATERS, W.A.U [image][image] [image] [image] |
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| VITIATION SENSING DEVICE TESTS |
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| PILOT FLAMES SHOULD BE BLUE AND SHARP WITH FLAME AT BURNERS EDGE. [image] |
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| Vitiation Sensing Device Recognition |
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| ,REPLACED AS A WHOLE UNIT. CANNOT BE DISMANTLED. |
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| Vitiation Sensing Device BBU's |
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| BBU versions have a SNIFFER TUBE from the DRAUGHT DIVERTER connected to the air inlet |
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| Vitiation sensing device Background to development |
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| European Gas Directive ruling from 1/1/96 all appliances connected to a flue for the dispersal of POCs must be so constructed that in abnormal draught conditions there is no release of POCs in a dangerous quantity into the room concerned. |
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| Vitiation sensing device 2 devices developed |
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| Oxygen depletion system (ODS) also known as oxy pilot, anti-vitiation device or atmospheric sensing device (ADS) •Thermal Backflow Prevention Device also known as a TTB stat (TTB comes from the Dutch term 'Themishe terugslag beveiliging'). |
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| VITIATION Meaning of..... |
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| LACKING IN OXYGEN |
